[ARM] 5480/1: U300-v5 integrate into the ARM architecture

[safe/jmp/linux-2.6] / arch / arm / mm / mmu.c

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e6344ec..39fca4e 100644 (file)
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -839,6 +839,20 @@ void __init reserve_node_zero(pg_data_t *pgdat)
                reserve_bootmem_node(pgdat, 0xa0200000, 0x1000,
                                BOOTMEM_EXCLUSIVE);
 
+       /*
+        * U300 - This platform family can share physical memory
+        * between two ARM cpus, one running Linux and the other
+        * running another OS.
+        */
+       if (machine_is_u300()) {
+#ifdef CONFIG_MACH_U300_SINGLE_RAM
+#if ((CONFIG_MACH_U300_ACCESS_MEM_SIZE & 1) == 1) &&   \
+       CONFIG_MACH_U300_2MB_ALIGNMENT_FIX
+               res_size = 0x00100000;
+#endif
+#endif
+       }
+
 #ifdef CONFIG_SA1111
        /*
         * Because of the SA1111 DMA bug, we want to preserve our